Synthesis, characterization and evaluation of NiMo/SiO2-Al2O3 catalysts prepared by the pH-swing method

César Fernández-Vargas; Jorge Ramírez; Aída Gutiérrez-Alejandre; Felipe Sánchez-Minero; Rogelio Cuevas-García; Pablo Torres-Mancera

doi:10.1016/j.cattod.2007.10.101

Synthesis, characterization and evaluation of NiMo/SiO₂-Al₂O₃ catalysts prepared by the pH-swing method

César Fernández-Vargas, Jorge Ramírez, Aída Gutiérrez-Alejandre, Felipe Sánchez-Minero, Rogelio Cuevas-García, Pablo Torres-Mancera

Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE)

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

NiMo/(X)SiO₂-Al₂O₃ catalysts were synthesized with various SiO₂ contents (X = 0, 10, 25 and 50 wt%) using the pH-swing method. In order to find the optimum SiO₂ content, the catalysts were evaluated in the hydrodesulfurization of 4,6-DMDBT, hydrogenation of naphthalene and hydrodenitrogenation of carbazole. Kinetic parameters of Langmuir-Hinshelwood type equations for all the reaction systems were estimated. FTIR analysis of CO adsorption for the sulfided catalysts shows that the amount of coordinatively unsaturated Mo sites promoted by nickel (CUS-NiMoS) follows the order NiMo/10ASA > NiMo/25ASA > NiMo/0ASA. This tendency agrees with the results obtained in catalytic activity.

Original language	English
Pages (from-to)	337-344
Number of pages	8
Journal	Catalysis Today
Volume	130
Issue number	2-4
DOIs	https://doi.org/10.1016/j.cattod.2007.10.101
State	Published - 30 Jan 2008

Keywords

4,6-DMDBT
Carbazole
Hydrodesulfurization
Hydrogenation
L-H equations
Naphthalene
NiMo/SiO-AlO catalysts

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10.1016/j.cattod.2007.10.101

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title = "Synthesis, characterization and evaluation of NiMo/SiO2-Al2O3 catalysts prepared by the pH-swing method",

abstract = "NiMo/(X)SiO2-Al2O3 catalysts were synthesized with various SiO2 contents (X = 0, 10, 25 and 50 wt%) using the pH-swing method. In order to find the optimum SiO2 content, the catalysts were evaluated in the hydrodesulfurization of 4,6-DMDBT, hydrogenation of naphthalene and hydrodenitrogenation of carbazole. Kinetic parameters of Langmuir-Hinshelwood type equations for all the reaction systems were estimated. FTIR analysis of CO adsorption for the sulfided catalysts shows that the amount of coordinatively unsaturated Mo sites promoted by nickel (CUS-NiMoS) follows the order NiMo/10ASA > NiMo/25ASA > NiMo/0ASA. This tendency agrees with the results obtained in catalytic activity.",

keywords = "4,6-DMDBT, Carbazole, Hydrodesulfurization, Hydrogenation, L-H equations, Naphthalene, NiMo/SiO-AlO catalysts",

author = "C{\'e}sar Fern{\'a}ndez-Vargas and Jorge Ram{\'i}rez and A{\'i}da Guti{\'e}rrez-Alejandre and Felipe S{\'a}nchez-Minero and Rogelio Cuevas-Garc{\'i}a and Pablo Torres-Mancera",

note = "Funding Information: The authors are grateful for financial support through UNAM DGAPA-PAPIIT IN-101406 project, CONACyT Project 49479 and CONACyT-CSIC program. To Ivan Puente Lee for HRTEM work. PTM, FSM, and CFV thank CONACyT (M{\'e}xico) for their Ph.D. fellowships.",

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doi = "10.1016/j.cattod.2007.10.101",

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T1 - Synthesis, characterization and evaluation of NiMo/SiO2-Al2O3 catalysts prepared by the pH-swing method

AU - Fernández-Vargas, César

AU - Ramírez, Jorge

AU - Gutiérrez-Alejandre, Aída

AU - Sánchez-Minero, Felipe

AU - Cuevas-García, Rogelio

AU - Torres-Mancera, Pablo

N1 - Funding Information: The authors are grateful for financial support through UNAM DGAPA-PAPIIT IN-101406 project, CONACyT Project 49479 and CONACyT-CSIC program. To Ivan Puente Lee for HRTEM work. PTM, FSM, and CFV thank CONACyT (México) for their Ph.D. fellowships.

PY - 2008/1/30

Y1 - 2008/1/30

N2 - NiMo/(X)SiO2-Al2O3 catalysts were synthesized with various SiO2 contents (X = 0, 10, 25 and 50 wt%) using the pH-swing method. In order to find the optimum SiO2 content, the catalysts were evaluated in the hydrodesulfurization of 4,6-DMDBT, hydrogenation of naphthalene and hydrodenitrogenation of carbazole. Kinetic parameters of Langmuir-Hinshelwood type equations for all the reaction systems were estimated. FTIR analysis of CO adsorption for the sulfided catalysts shows that the amount of coordinatively unsaturated Mo sites promoted by nickel (CUS-NiMoS) follows the order NiMo/10ASA > NiMo/25ASA > NiMo/0ASA. This tendency agrees with the results obtained in catalytic activity.

AB - NiMo/(X)SiO2-Al2O3 catalysts were synthesized with various SiO2 contents (X = 0, 10, 25 and 50 wt%) using the pH-swing method. In order to find the optimum SiO2 content, the catalysts were evaluated in the hydrodesulfurization of 4,6-DMDBT, hydrogenation of naphthalene and hydrodenitrogenation of carbazole. Kinetic parameters of Langmuir-Hinshelwood type equations for all the reaction systems were estimated. FTIR analysis of CO adsorption for the sulfided catalysts shows that the amount of coordinatively unsaturated Mo sites promoted by nickel (CUS-NiMoS) follows the order NiMo/10ASA > NiMo/25ASA > NiMo/0ASA. This tendency agrees with the results obtained in catalytic activity.

KW - 4,6-DMDBT

KW - Carbazole

KW - Hydrodesulfurization

KW - Hydrogenation

KW - L-H equations

KW - Naphthalene

KW - NiMo/SiO-AlO catalysts

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U2 - 10.1016/j.cattod.2007.10.101

DO - 10.1016/j.cattod.2007.10.101

M3 - Artículo

SN - 0920-5861

VL - 130

SP - 337

EP - 344

JO - Catalysis Today

JF - Catalysis Today

IS - 2-4

ER -

Synthesis, characterization and evaluation of NiMo/SiO₂-Al₂O₃ catalysts prepared by the pH-swing method

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